handlelibraw1394 handle
channelchannel number on which to send on
tagdata to be put into packet's tag field
sydata to be put into packet's sy field
speedspeed at which to send
lengthamount of data to send
datapointer to data to send
rawtagdata to identify the request to completion handler
DEPRECATED
This function starts the specified isochronous packet transmission and
returns 0 for success and a negative number for an error, in which case
errno will be set.
When the send completes, a raw1394_loop_iterate will call the tag handler
and pass it the tag and error code of the transaction. tag should therefore
be set to something that uniquely identifies this transaction (e.g. a struct
pointer casted to unsigned long).
Isochronous packets are automatically